/Engine/Source/Editor/UMGEditor/Public/IHasDesignerExtensibility.h
Deprecated* RemoveDesignerExtension is deprecated, use the IDesignerExtensibilityFactory instead.
const [TArray](API\Runtime\Core\Containers\TArray)< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FDesignerExtension](API\Editor\UMGEditor\FDesignerExtension) > > & GetExternalDesignerExtensions() const